Attachment for pneumatically tired wheels



J. KINDERVATER ATTACHMENT FOR PNEUMATICALLY TIRED WHEELS Nov; "7, 1944.

Filed April 21, 1942 3 Sheets-Sheet l INVENTOR.' v Juz/usAVA/02991447277? Arro/P/vzx' Nov. 7, 1944. J. KINDERVATER ATTACHMENT FORPNEUMATICALLY TIRED WHEELS 7 Filed April 21, 1942 3 Sheets-Sheet 2 IN VEN TOR.

VIII! Patented Nov. 7, 1944 oFricE TIREDWHEELS Julius Kindervater,Richmond, Va.

- Application April 21, 1942. se ii'u v .439,868]

21 Claims. ,.(01. 1522- 185). l.

V This invention relates to improvements in "pneumatic tires *forautomobiles and other vehicles, and particularly to a combinationpuncture-proof .armor' and salvage and safety attachmen't forapplication to pneumatic tires from which the tread surface has beenworn down to an unsafepoint,v whereby the worn tire may be kept inservice. i y

Conventional r pneumatic tires are formed of wovenfabric layersvulcanized together with rubber to'withstand the load and internalpressure "andcapped or treaded with live rubber; When the tread is worn.downv to or beyond the fabric the the may be 'recapped or retreaded forfurther use' if the tireis in generally good'condi 'tion. It frequentlyhappens, however, that the side walls-of the tire are damaged whenapunc- -tu're' occurs; the flattening efiect tending to break 'the fabricand render the tire unsuitable for capping or retreading, and in suchcases the inner tube is liable to be pinched and damaged beyond repair,due to riding of the wheel on its such a-manner that, if rubber isusedfa conservation in the use of rubber over that required forrecapping or retreading will be'effected.

Still'another object of the invention is to provide a construction ofattachment'of the charcombination and'arrangement of parts, hereinafterfully described and claimed,reference being hadto the accompanyingdrawin in Which-, a

Fig. 1 is a transverse section through a tire and wheel rim showing theapplicationthereto of one form of attachment embodying my invention.Fig.2 is a verticallongitudinal section through a portioniof thesubstitute tread.

. ;.Fig.:3 is a view of a pair. of the hinged tread rim when-the tire isdeflated, particularlywhen down close'to the fabric. 1

The general object otmy invention is to pro- 'vide an attachment forpneumatic tires which isidesigned to'prolong the life of a worn tire; toeifectithe conservation ofrubber, and to provide means whereby thepuncturesare eliminated.

the pneumatic tire has a weakenedtread worn "slugs; v

- 'J-Fig'LG'lSE sectional view through a portion of plates.

:Fig'. .4is adetail section through one of the guard plates'showing themode of mountingone of the-tread plate lugs thereon. i

1 .Fig. 5 isa detail view of one of the tread plate a. tire-wheel rimand guard'plate and showing a Another object of the inventionis toprovide a an attachment of' the character describedwhich may be appliedt'o an' ordinarypneumatic tire and wheel rim with no change inthe-construction of the tire andlittle' or no change inthe constructionof the rim, and wherebya worn tire may be maintained in continuousservice.

Still another object of the invention is 'to pro .2 vide an attachmentoftheicharacter described a'whereby atire with a worn tread or brokenfab-,1. (ric; may be supported andutilized as a resilient- .preferrecl'manner of attaching'the guard plate tQtheWheeI-rirn. w I 1 i. Fig. Trisaperspective view showing adjoining tread plates of modified form asadaptedfor the 1 use of an-endless rubber-tread-or wooden tread "blocksx3 Fig; 8 -is'- a view of, a pair of the hinged tread- -platesshown inFig; 7.

i Fig. 9 is a sectional view through a portion of a tire,- gu'ard plateand,tread,.showing a modified 40 form of tread plates, and mode ofmountingthe same' on the guard platesL i ybacking for-asupplementaltread, the only re-.-

placements necessary being to periodically-apply i new, tread portionsto a tread base when occa- I 3 1 Stillanother objectof the'inventionisto pro-' I {5101]. requires."

ivide-an attachment of the charactergre'quired whicli'will permit of theapplication to a wheel 7 and tire of a complete" supplemental "tread, as

'such; "or of a tread base to which new-tread sur a tread formed ofrubber-orother materials, in

- FigplO is a. perspective view of a portion of the tread shown in Fig.9 and tread 'blocks mounted thereon.

tread blocks and a modified mode the same on the guard plates. I e I v vFig. 12 is a longitudinal sectionthroiighja por- 'iaces may beappliedwhen needed. in" a ready and convenient manner.

.'F ig';'11'is,a View similar to Figi9jshowing still another iform-.-.oftread for supporting wooden of mounting ing still another modifiedform-oftread and mode of mounting the same on the "guard plates.

h I r'iglii isa'planf'viewoi 'two'adjoining tread on members-or-plates-of the form shown in Fig. 13. V

Fig. is a longitudinal section through a portion of the tread shown inFig 13 showing in dotted lines and dot and dash lines, respectively, thenormal line of depression of a tread block and its line of depressionwhen the tire becomes deflated.

Fig. 16 is a view of one of the tread plates or sections shown in Figs.13, 14 and 15.

Fig. l? is. a.,view ,similar to Fig.,l3 showing still another modifiedform of means for mounting the tread on the guard plates.

Fig. 18 is a detail section on the line l8-.i8 of Fig. 17.

Fig. 19 is a transverse section'on the line I 9-4 9 of Fi 17. r

Fig. 20 is a detail view showing a modified form of guide flange or wingfor the dove-tailed guide flange of a tread plate or section.

Fig. 21 is a sectional view showing. afurther.

modified form of guide connectionbetween a tread ,plate or section;and aretainerring.

- Fig. 22- is a longitudinal section through a portion of a treadcomprising afabric base member .anda treadstructure mounted thereon.

.Fige23 is a seotionon the line ;23,;23 of Fig. 22.

' .Figs. 24 and, 25 are viewsgshowing a tread construction including anendless link chain.

Fig; 26 is a transverse section through a portion :of a tireshowingstill anothermodifiediorm of attachment applied thereto. 1

Fig. 2711s a'section oniinel'I-JT of-Fig. 26. Referring now moreparticularly ;to' Figs. 1 to 5,

lnclusive, of the drawings, l designates the outer shoe or, casingof a;conventional pneumatic. tire, and 2 the inner tube-thereof, said shoebeing provided withthe-usual retaining :beads: 3 to engage theretaining'flanges monthe tire carrying wheel rim 5 which may bev of. anyof the [types incommonuse. .Thesshoe I. is provided with the usualrubbertread 6. Thehdrawings. .show the application ;of the invention toxa.tire,

the tread 6 of which is worn down to the fabric :lineyso as toordinarily requirev recapping or. rev treading in order to maintainthe-tire .ins'erviceable condition, assuming that'itsis otherwise ingood condition for thepurpose. .:My= invention is designed forapplication to the wheel rim and a L tire ihaving .a tread souworn down,to adapt the .tireitobe used without recapping oni'etreading, and whichsupports'thetire andprovides-a sub-;

stitute tread of a durable character and adapted when WOIIIiSOaS'tO bB.no-longer serviceable to Joe replaced .in a :ready, convenient andinexpenv .sive manner. The treadv of the attachmeneis adapted to moveinwardly and outwardly with the the tread :under load and air pressuresin the usual manner, and is also adapted, 1 in the t event of deflationof the tire, toprovidea surface on which thewheellmay. run withoutdamage to the tire shoe and inner tube and without.

liability of the loss of oontrol ofuthe vehicle 'by the driver such asnughtordinarilyoccur. due to :'a.collapsed tire.

The attachment comprises a supporting casing formed ;of. a pairqofaendless or annular guard: .;plates 'l. arranged at. oppositesidescof'the tire. Eachcf these guard ;plates;h'as.-.a body; portionconforming in contourlto theouten surface of the tire shoe between, i shead gand; tread portions and terminating in straight inner, andouterortionsa ands, respectively, which;are arranged in parallel relation to.the: vertical centergof .the

wheel The portions -8 of theseplates areprovided with flanges In toextend under thesrim 5 nd wit s i g l adjacen to d,,fl .1 e s= overhangthe outer sides of the tread 6 and are formed with slots l6 lying insidesaid flanges and spaced therefrom. The portions 8 and 9 of each plate 1are preferably reinforced by ribs ll arranged atsuitable intervalsaround each plate provided, respectively along; -their i neeting1transand welded'to or press formed thereon. The

1 plate I may, in practice, be formed of metal, or

any suitable and durable composition material, pressed, cast orotherwise shaped. 1 The outwardly extending portions '9 .of the .plate 1support a substitute the tread comprising an inner tread baseorcarrierfind-311150111361- tread .surface of suitable construction and material.The tread base or carrier; shownin Figs. 1;to 5, inclusive, consistsofanannular linkband formed of alternatelyqanranged tread plates or sections[8 and I9 and which extends around;thetread surface 6 of the-tire-shoe.;The tread plates or ions Is a 1 I9 :are..:0f channe ed pfo m anverse edges with inturnedandoutturned hooked flanges 112 D and 2!respec-tiyelm-which are interengaged with each other; to pivotallyconnect-the tread plates orsections together. {Thecl' annels in the.tread platesare,opemattheir sides, and at their sides. the, flangesextend. under therim (flanges 15 of the guardplates fl, whereby thetreadecarrier is held in position ,against Outward displacement. Thetread carrier so formed. .car-. qries a tread surfaceZZ which, asshowninFigs, 1 and 2,7 isfcontinuousior, in the, form set, aiband ofrubber or otherlresilient: material, elastically Hor'otherwise held :inthe-channels of the tread plates or sections. This -.tre ad ,sunface is,pro-

@vided withoutwardlyextending sidezflanges 23 .whichfengage under.ther-imsllia to :hold the tread -.band, or surfacefromianypossibilitylot outward displacement. ,;Holding;lugs:.-24.arerivetedlor weldedto 'the tread." plates-148, 10].. -.toboth the ,tread plates "l8 and: l9.if';-desired,-,and-.have threadedstems or .boltl portions 25 which project outwardly throughthe; slots 1|6 and ,are provided with lock, washers :26 .and nuts' ZLto detachablyconnect. thetread :carrier with the.-.guard :plates such manner ;asitoallow the vtread carrier and tread surface LtOElmOVEE inwardly and.outwardly with th .tireztread..under .'normal load and air pressures to:give: the desired :cushioningl sheet in .m'ovements ride in the slots:I16 which: are ofsuch the runningsof the wheel}. The bolts-:25 in such.-1eng1th as:.toallowitheatreadfio have aunormal range. 10f. .inward I.cushioning amovementunder ---loads.: .In. suchran-ge of movement theouter surface of the tread 22 is maintainedzbeyond"the outersurfacesoitherimilanges 15.: ii[f-,:however,

,the-tire houldbecome ,defiated.--.to;.'an abnormal g extent, duelac-decrease: of air pressure" within the tire be nd a pr e m n::point,' -the .tire;- will be su o ted y t 'e p a s 1.; a ainst t nduede pression or collapse. "At sthegsame; ;tim e -.inward movement of thetread beyond-. thegimgsurraces 15 will. be, prevented, and suchrimtsurtaces ,will

come ,into, play to forrn urfacesppn. which the .75,

l 'l rr ri a t r r wheels in service will also be effected.

tire will be maintained in runningcondition until repairs can be made ornormalpressure condiftionsrestored andloss of control of the vehicledue'totire collapse prevented; g

'It'will bejunders't'oodfrom the ioregoing that,

by simply providing means of attachment of the plates 1 to any ordinarywheel rim, my improvedv attachment may be appliedto a'pneumatic tiredwheel .to support a tire which is ordinarily 'no" longer serviceableowing ,to the wearing down toj'the fabric point of its tread, and'sothat a substitute tread may be provided to maintain the worn tire inservice without the necessity of recapping or retreading the tire,andthat whenever the substitutetrea'd is worn down a new substitutetread may be readily applied for use in its place. By this means thenecessity of discarding the worntire is avoided, as'well as the'necessity of providing a complete new tire, so

wheels. may be efiected, while the pneumatic I cushioning "action of thetire in service is preserved. If in the construction of the attachment arubber tread, such as 22, is ernployed it will be only necessary, whenone tread is-worn, to substitute another tread formed of a comparativelysmall amount of rubber, aspompared with that employedin anew tire, sothat greateconomy in the cost of maintaining pneumatic] tired at evenhigh speeds","since thetire is firmly supported in position'and the'tread'portion thereof,

is securely held in working position against any possibility ofdisplacement under allnormal running conditions.

In Fig. 6 I have shown a preferred manner of attaching each guard plate1' to a certain form of rim in which the plate is formed with an offsetportion Ill as'wellas a flange I4 to engage portions of the rim andinwhich a portion of the plate intermediate the flange and ofis'et portionis apertured for passage of button head fastening bolts I4 spot weldedto the rim.

. In place of the continuous treadband 22 I may employ tread blocksfofrubber, woodor other suitable materials applied hereinafter described.

In Figs. 7 and 8 Ifhave'shown channeled'tread It Will i to the treadplates, as

, ed at intervals by clip plates welded thereto, or welded to one'ringand suitably'fastened tothe other ring. The rings form "a channelinwhich are fitted treadblocks-36 of wood, rubber or other'materialjwhich blocksare clamped between the rings'andprovidedwith'beveled or dove tailed side edges 30' engaging in'thekeeper recesses formed by the wall 33. Each guard plate '1 in thisembodiment of the invention is formed with 'a rim portion 9 devoid ofthe flange 15-, andto the' fl'ange of each tread ring is secured aretaining ring 31. The outer edge of the body'of the tread ring slidablyengages the inner surface of the portion 9, while the ring 31'slidably'engag'es the outer surfaceo f the portion 9, thusmountingi'thetread carrier and tread blocksto move bodily or as a unitinwardly and outwardly under load and air pressures. As' shown, thecarrier rings 3|, 32 seat on the worn'tire treadB; which issuitablyflattened to adapt=the carrier rings to bear on the surface 6throughout its entire width, and the ,tread structure as a' whole,except the ri'ngs31, are applied to the tire when the latter is indeflated or partly deflated condition, after which the rings 31 areapplied and the tire fully' inflated to-dispose the' parts in the normalrelative positions shown'in Fig. 9.-- The tread surface will thusbe Suported for service use and for sliding "movement's inwardly and.outwardly with the tread portion of the'tire for-cushioning 'actions inthe normally'inflatedcondition of 'the tire.) In the event;however,-that the tire sho'uld become deflated-the flanges 34 will moveinwardly under load pressure and rest againstthe rim r edges of theportions 9 whereby the tread-Will be backed'and supported topreventcollapse of and [injury to the tireand tube The rings 31 may orotherwise secured'tread blocks 40 of wood, rub

"be suitably formed'toireceive packing 3'lto prevent entrance. of dirt-or moisture between same and the'guard plate portionsl.

Figs. 11 and 12 show a structure in'which the,

the

guardplate portions 9 are provided with inwardly extending flanges 38andin which the sub stitute' tread comprisesan endless ringorban'd 39 ofa. strong fabric to-which are bolted, riveted "her or other. material.The side edgesof this plates l8, l9 generally similar in form to thetread plates 18,- l9,'but which are providedwith dove-tailed or undercutsidewalls 28 having outstanding flanges 29. These walls form keeperstoreceive thebeveled or dove-tailed sideedges 30 of acast rubber treadband 22, as shown in Fig. '7, or similar edges on rubber or wooden treadblocks applied to the tread plates The flanges 29,'when the tread platesl8, I9"'are used with the form of guard plates shown in Fig.

lymay either overlie or underlie the flanges" l5 of the uard. plates, orthey may be used with guard plates from'which the flanges l5 areomitted, in which case the-flanges 29 will close the spaces between thetread plates and the portions 9 of the guard plates in'such manner'asto. allow the edges of the portions 9 to operate .as riding :surfaces inthe event of thedeflation of they tire. l

Figs. 9 and 10 show the use of a tread carrier carrier band extendtunderthe flanges-39 and the blocks are pivotally connected at their-adjacentends,xwith clearance for freedom ,of motion, by transverse bolts-4|,theends of which extend under. the flanges'38 andthrough .slots .l6 inthe x portions 1 and-are. fitted with nuts 42,.whereby th carrier andtread blocks are. held in position with the carrier band seated on the,worn tiretread.6.::--With this construction the-flexib le bandand'blocks may move inwardly and outwardly withfthe tire tread, in whichthe ,blocks I may normally -move inwardly until their tread facesalinewith, the' flanges 38. In the event I that the tire shou-ldbecomedeflated theflanges 38 will form-"tread surfaces'to contact with theroad; surface and on which the wheel may ride to prevent injuryto thetire," tube. and tread.

,In the structure shown in Figs. 13 and I l-the guardplates ar of thegeneral *form. shown in Fig. 11, each having a portion-9,.and aninwardly extendingffianzge 38 ,but' the tread is -forme d'of I shallowpan-like plates or members, each having at 'one' end'a'v-shapedconvex-e-nd .wall '43 other materialfare seated and secured inthese tread plates or members The 'convex' end of e h t r-c d: ates i elai ed. or-ns tedri .theconcaved- -,endof thenext adjacent plate, .toherring-bone the plates. .into, one another pr -to form a. break-jointconstruction to ..a\ I.oid ;.thurnp .ab eachljoint'when road on est sad:TO 191 flanges, are secured fretainerpringstfl. which ride-on the outerfaces of theguardmlate portions 9,. thus slidably v mounting the. treadstructure onthe guard plates for; inwardand outward movements with thetire; tread. This construction avoids thenecessity ofiemployingboltspassing through anyv of the tread parts to secure the same to theguard plates. k .In the .eyent that the tire hould become-,defiatedlt eflan esfii wi .contactwvith the flanges, and prevent collapseofiandlinjury to the tire, tube and tread struc- -ture.. .Fig. lfishowsthe. normal and deflated de- .pression lines insuch service actions.

.,-Eigs.-l16..to. l9, inclusive,-, show a structurein which the shallow,panelikegarrier tread plates or members 48 are or. may beof the same,con-

.struction as that shown inFigs, l3 ,to,15,.. inclu- Lsive, or whereinthe members .48 may be of recstangular-formation and independent ofengage- -ment with each other.. These members 48=. are

provided at their sides. with doven ailed zgl ide .fla nges.49 whicharedisposed between. and .slidably engagedove-tailed guideways formed;by .inclined guide flanges. 501cm .the, guard .plate -portions 9.-These flangesQSO- are preferably -f ormed by slotting. and dividingparts ofwthe :portions 9. and bendingw-thepdivided parts ,in- .wardly',as shown. The l flanges 5B are disposed :above or beyond the flangesJSof the guard 3.48, which slide in the guideways so formed, are vlimitedin their extremexinward movements; :by .the flanges l5. ,Doveatailed orotherwise suitably se.cured--in the channeled or pamlike, tread plates48 are tread blocksfil: of rubber wood or;

' 1 in positionand the retainer. ringsappliedwhen azthe. tire isdeflated, after-whichthetire is inflated to service pressure,-bycwhichthe flanges -ti49iof the treadrnembers are brought into nor- -:malposition. in which they engage the flanges,

-54. of the retainer:rings.g By this-construction the tread members maymove inwardly and out- .iwardly with the tire-tread under normal service1 :conditions. :zbecome deflated the inward movement of the tire andtread-members will-be limited by engagement of-flanges 49 with flangesl5 and the flanges will cooperate with-the tread blocks. to-form asurface on which the wheel may-ride, thuspreeventing collapse of andinjury to .the-.tire,- tube orv tread: structure.

slnsteadofiorming theguideflanges 50 .in the manner :described .as',integral: parts oftheguard 51 plates, they. mayzconsist, as shown in-Fig.-l2, of

:7 separate pieces of metaljfl welded tot-the portion ,9 ofthe guardplate .-..:Als9,;as shown in.-Fig;-21, winstead of;;using doveztailedprojections: 49. on u h ad p at s Rammed-flan es orpmiectio In theevent-that the tire should.

n Fi a i l e..me me eia aeyieew y armed by-sui e.- trip i infate Otherei-ilahle or afi t-fi ecnte ;..t e p ienssl 9? the uard p at 1 2am 3 Ihave s n s l .a p he form .of tread structure, in which 'an endless,treadcarrier orbasefidisproyided ou which may be. mou ed-and sui a s cue a ee le sfl sectional vtread.surfac g'e; 5 B.,.0f rubber, wopdor othersuitable material; fabric carrier base m y e mend at i terva wi e et kbrQclip plates 5] ,rivetedfor otherwise fastened therers; andparryingghbolts 58 "or other fastening members ior'iattaching the sametothe-guard pl s. and erv n the a e i l q nz as h lug belie- 1: th s id swa fl n e .49; for either fixedly or, slidably. securing? the carrierbase. to the guard plates; I may also as shown in Figs. 24 and 25} en"1ploy an endless' b and type ofcarrier base in theform of alink chain59} the members of which maybeprovided with. bolts, .50 -er -guideflanges to secure .,or slidably. mount the chain. on the guard plates.'.To tlie. chain links may be applied tread plates of suitableform andcarrying tread blocks or a tread bandof suitable ,construction toprovide a resilient orfiexible tread surface.

In l figs..26 andZ'Z I have shown a structure in which the portions 9 ofthe guard platesc'l are. formed with outwardly projecting flanges 6| 1to which is applied a tread formed of anendless band=fi2 of.rubbenfabricor othersuitable flexible materialto the. inner v face ofwhich are ap- ,.plied backing plates o r blocks fili of any suitablernaterial and ,to the -outer face of which are securedrenewable treadpads or blocks 64 of rubb r 01 Othersuitable material. Thesideed of.theba .52 x end-e twe i l 9716 the fl n e 6| and are fastened theretobyrivets bolts or other fasteningsfifl'. To the inner faces of blocks 63are secured reinforcing .p lates or metal spacers 6 5 ,wvhichmeston,the-tire; tread 6 ,and sustain the tread to-prevent the same frombuckling or .the flanges fil from collapsing inwardly. Inthe ..,6;V$nfflof. the. tire ,beco ningdeflated the plates 65 will Wedge againstportions 9 and hold the tread from collapsing. construction allowsnew zpads to .be substituted for the' pads-'64 ,when ,worn out at smallexpense.

,1 From the foregoing description, taken in connection with thedrawings, therconstruction and mode of use of my-novel and; improvedattachrnent for; pneumatic tires will be readily under- :stq q and tillbe. seen-that t invention p vides;an-;attachment,which.may be appliedto a yehicle wheel-rim andpneumatic tirehavting a worn-down tread sothat thettire will, be sup- -pqrted and an efiicienttypeofsubstitutetread surf ace pr ided to wadaptethe; Lworn tire to, be keptin continuous; service to perform .the. .func- ;,t ion of a cushi0l1ing,-medium;By this means ;;ti1'e havingwealgnesses, such, as wouldpreyent it from ;being recapped or-. retreaded,may be u sed and the;necessity in any. lease of-recapping l) retreading avoided with ,a.consequent con- ;servation in the use, of rubber- My. attachment may beapplied in areadyand convenient man e; to 'therims of vehiclewheelsinservica'or tospecial .rims,-=, and supplied with, an approved jorzn of'tread surfaceat a low. cost, less than the cost of a new tire and notexceeding the cost oif recapping or. retreading an old tire, and with;.-the advantage that: an. ;old. tire. may be kept in .service,-foramindefiniteperiod by ;.nierely ap- 495. may besformed-orprpyided theren as sh ownn'l ..;plying acomparatively. inexpensive tread suriWhat Iclaim. is:

. p f 3. In a pneumatically-tired wheel, and in com, Ibinationwith apneumatic tire and its channeled wheelrim having tire bead holdingflanges, an-

to the bead holding flanges, and means mov-.. 70:

, bers having iriwardly extending flanges for conj tact with theroadsurface to support the whee1.;75;

a ,.10 While the "structures disclosed for. purposes of exemplificatiohare preferred, it. will, of course,

be, understood that-phanges in the form, construction and arrangement ofparts may be made within the scopev of the appended claims with- L15 outdeparting from the spirit or sacrificing any of the advantages of theinvention.

1;. Inia pneumatic-tired wheel, and in combination witha pneumatic tireand'itschanneled 20 wheelrim having tirebead receiving flanges, annular,side members for. attachment to the rim conforma'bly shaped; andarranged to bear on --and'su'pport the side wallsof the tire againstoutwarddeflection, said side membershaving in- .25

her supporting portions facing :said bead receiving flanges .and havingoutersupporting portions disposed at opposite sides of the tread surfaceof thetireyspacingand fastening means being I provided between theabeadreceiving flanges and 30 the; inner supporting portions :of the sidemembers and detachablytfastening. the

same together, and a substitute s tread for the I the supported .by theouter. supporting, portions of said side members and arranged to seatagainst the tread .35

surface of the ,tire. a a I 2. ma pneumatically-tiredwheel,and in com- I.bination with. apneumatic tire; .and its channeledwheel, rim, 'having:-tire5 bead receiving flanges, annular side members for. attachment tothe rim conforma bly'shaped and arranged to bear on and support the sidewalls-of the tire the tread surface of the tire,,lugs welded to therimand'bearing on-the bead receiving flanges,

- bolts carriedby thee-lugs and'.passing through theinner supportingportions of the side them-.60:

bers,. clamping nuts .engaging said bolts and clamping the side membersagainst the lugs, .ribs

on the side members'reinforcing said inner and outer supportingportions, a substitute tread for the tire arranged to;seat against thetread v sur-, 55 face of the tire and mounted on said outersupporting;portionsof the side membersso as to be movable inwardly andoutwardlywith said tread surface.

nular'si de members forattachment to therim conformably-shaped and:arranged "to bear on outward deflection, a substitute tread for the tiremounted onsaid side members, means spacing the inner supporting portionsof the side members from and detachably securing the same ablyconnecting the substitute tread with the outer supportingportions of theside members, said outer supporting portions of the side'mem- .event ofdeflation of the tire; .j.

on a, recession of the substitute tread occurring .in the eventofdeflation of the tire, i

;, 4. In apneumatically-tired wheel, and in combination with awheelrimand a pneumatic tire mounted thereon, guard plates secured to therim.andembracingthe sides of the tire, said plates having supportingportions disposed on: O'PDO- site sidesofthe tread surface of the tire,a supplemental treadslidably connected with said sup- .porting;portions.far1d bearing on and movable .with the tread surface of the tire, andflanges ext n in inwa f om ai supporting portions; and. overlyingthelateral margins ofthe supplemental treadand exposed for contact withfthe road surface .to support the wheel in the event-of deflation of thetire and recession of t e. su p eme rea I U 5.; Inaypneumatieally-tiredwheel, and in combination with a wheel rim and a pneumatic tire .mountedthereon,- -,suppo rting* members secured to, the rim-and arranged atop-posite sides of the tire, and a tread structure overlying the treadof e t e an mqvab wm u t d ionxt e supporting members; so as-;t0begmovable, inward- :lyandaoutwardly with,thetire tread, said supportingmembers embodying means for limiting the inward and outward movements ofthe tread structure, including tread surfaces beyond which thetread'surfacepf the tread structurenormal- .;.ly projects, said treadsurfacesof theisupportmg-members beingadapted for contact-with the,road, surface to-gsupport the,,wheelon a recession of the. .treadstructure occurring in the .1 a pneumatically-tired wheel, and incornbinationwitha wheel; rim anda pneumatic tire mounted thereonand-having: aworn treadsurface guard plates adaptedtobe secured tothewheel rim so as-to engage opposite sides of the tire andzhavingperipheral supporting portions ,lying on oppositesides of the treadsurface of the tire, a supplemental treadadapted to overlie the treadsurfacegofthe tire, and retaining rings engaging the lateral margins ofsaid'supplemental. tread and movably-holdingthe fsame in engagement'withthe-peripheral supporting portions of the vguard plates.

. 7. In a pneumatically-tired wheel, and incomwheel rim having tire-beadholding tflanges, a

holding flanges and detachably fastening. the

inner, supporting portions of the plates thereto, a substitutetread'structure seated on thetread surface of; the tire and disposedbetween the'outer supporting POItlOIlSfOf the plates, and meansdetachably connecting thefisupplemental tread to said'outer supporting;portions of the plates. and support the sidewalls-of the tire against eg.8. Ina pneumaticallyetired wheel, and in combination with apneumatic'tireand itsfwheel rim,

sides of the tread surface of the tire, and-a substitute treadcomprisingflexibly connected linked .-'tread members bearing on thetread surface of the tire and carrier members including parts in-holding1 engagement with the lateral margins of bination withapneumatic tire and a channeled Q peripheral portipn's pf guard pIateSto eonnect' the tread inembersflthrewit for inward and= outward=movements with said trad *surface? 9:111 a pneumatically tiredwheel;=and in combina'tion with a pneumatidtir andit's' wheel rim, aframe or casing secured towns rim and en'- cldsirig the" tire' -with theexception of its tread surface; said frame'01' caslrig havihg treadsupportin'gportions formed with -guideways and l'yingon'opposite' sidesofthe treadsurfaeofthe tire, and a supplemental head 1 comprising afieiiibl'e" 'bahd strncture formed oi linked units consisting of =treadmembers and holdirig and guiding me'mbers f ineliidin'g'parts in'holding en gagement with the lateral' mar'gins ofthe treaderipherarportionsparallel with eaeh other and disposed *on' oppositeside's='of the-tread 's'urface of th' tirey a supplemental-tread bearing1 on I the tread surface of "th'e' tire= bridging the'space betweensaid'outer peri pheral" portions or the guard plates, and retaining-meansarranged between the lateral margins ofthe suppler'nental tread' and the'supportirlg portiens of the plates and members and parts-lying beyondthelateral margins of -the tread members and projecting --inwardly fromthe flexible floahd structureand 'engaging the'guidewaysinisaldsupporting portions the 'tread members; and parts mounted ou-said enclosing the tire --witli theiexceptipn' of its tread surfacasaid -frame 'or casing having flanged peripherahportions disposed onopposite sides of the tread surfacepfithe tireyand' a supplementaltread-bearing on athe tread surface- 0f the tire and halvingatread'su-riace of less width? than the distance betweenthe flangedperipheral portions of the irame' or casing and also: having lateraledge portions 'extending under the flanges of said peripheral portionsof the frameoreasing and connected wlth said portions so: as tosupport/"the:- supplementaltread "in positioni ior inward: and": entwardmovements :With ith'e tire treads t 14. In 'a pneumatically-'tiredwheel;. and 'in combination with a pneumatic tire :and its wheel rim, aframe or casing comprising :guard plates secured to the rim andenclosing the tire with the-exception of its 'treadsurface,"- saidplates .rhav-ing' peripheral portions disposed: on opposite sides of the'tread surface-aofl the tire and formed with? guideways and inwardlyiextending 1 flanges, a supplementali tread bearing'zon'rthe tread:surfaee of the tire and comprising an annular series I efwlinke'dunits;1 and retaining 1 elements on said units .exten ding laterally beyondthe tread surtace of: the isupplementaltread -and: :projetingzunderethe? flanges: and engaging the guideways ofvith'e'perlpheralportionsof-the plates;

r 15.:3'111 a rpnenmatically tiredsiwheel; and in combin ation": with apneumatletireiand it's wheel rim a v frame. orecasingcomprising' guardplates seen-red =t0 the :rim 'and enclosing the tire with the exception:of f its tread surface; said plates shaving flanged peripheral portionsdisposed on engaging s'aid-margihs of the trea'dysaid -rneans being'ada'pted to 1 ermit Ii normal inward' ain'd outward movements ef' thesupplemented-tread with the-itiretread an'dtd'be-brbughh in contact"with -the' roadsurface tosupport=thewhe1 in the event bt sense-on of-tlle' tire and recession (if-the supplemental treacu 112 Inapneumaaeanwmea wheel; and in combination with a pneumatid tire-'andlts'wheelra rimg a irame orccasing -securedto theirim and enclosing thetire witfi'tl-re exception 'ofits tread surface;-: said :rrame or eeing*havin'g flanged supporting: portions" disposed on "oppo'sit sides ofthe' tread suriac'e of the' 'tire inturned holding n5 fiangeseonsaidsuppmtingportions; and a supplemental 'tread bearing on -th'e" treadsurface of the til e an'd havingside portions disposed adjacent t'o aridextending outward laterally 'beyond the lateial -margins' ofits trad=fae and e'ngag-ring: said: holdin'g flanges on the supportingportionsiof thvframe or" casingmndsupported in operative' positionthereby:- a

pneumatreall y-tird-' wheel, and in combinatiomwithapneumatie tire andits wheel:

rimgra frar'ne oi basing secured to tl'fe rim and enclosing" th'e tir ewith" the=exceptionpf its 'tread surfabe; said: ira-the 1 orcasinghaving flanged eripheral portions disposecron' opposite sides" ofthe tread .suriace sofithe tire; and-"a supplemen-z.

tal 1 tread be'aring on T the tread- 'surfaee' 'of the tire andinsengagement with said flanged peripheral portionsoft'tlie frame "orcasing, the

- flanges-of said portion's extending-transversely 0t the wheelformingmsurtacesiior montact' with l 17 the road surface to "supportth'e wheel' in' the event-0fdeflationofxthetirefi 13;--Ina:pneumatically tiredriwheeli and m 'combinat-ion with: a pneumatie tire'and its' wheel rimpa frame or casing secured to the -rim and oppositesides of the tread surfiaee-of the tire, a supplemental tread-bearing on1 the itread surface: OfTthE tiIQ and: comprising channeledmetallievmembers heach' having a tread element mounted? thereinyrlateralflanges 1 on said members engaging: the fiangesof"saidperipheral-portions' =0fi the: guard. plates; for' inward andoutwardmovements 2 with -Isaid tread i 'surfae; and retaining and: guidelelements on the metallic membersiof the? supplemental:tread 'slidably'engaging. theiperipheral portions of the plates-"inwardly lofthevfiangeszthereonx 16; In a pneumatically-tired whe'elg andincombination witlir apneumatic tire and its wheel rim; a frame" or'casing-comprisingguard plates secured. to? the rim and: enclosingthertire with the exception:- pf itstread 'surfaoe,' said plateshavingmllanged" periph'eral portions disposed-- on opposite sides *ofthe tread 'surfae of the tire, a. supplemental tread structure*bear'in'g on the treadsurfae: of ithe tireandeomprising a treadcarrier: clisposedibetween said 'peripheral portions ofatlie guardplates and formed of linked members each carrying a renewable-treadsurface, lateral projections on r the carrier. members extending un derthe flanges of the peripheral portions of :the guard plates; and boltsrigid with the ecarrien 'members-=and'- slldably' engaging theperipheral portions of the guard plates:

"17.' In' a pneumatieally tiredwheel, and in combination-witherpneumatic 'tireand its wheel rim; a frame'or' casi-ngcomprising guardplates secured to the rim and-enclosing the'tire with the ex-captionof'its-tread surface, said plates haying peripheral supporting portionsdisposed on opposite. sides ofthe tread :surface of..the tire;- and 'asupplemental-tread bearing on the tread surface of-the-tireand'disposedbetween said periphera'l portionspf the'guard plates, saidtread:'-'comprisi-n'g'-arr-"annular" series of flexibly connected treadmembers, and holding means including parts engaging the lateral marginsof the tread members and parts slidably connecting the tread memberswith the supporting portions of the guard plates.

18. In a pneumatically-tired wheel, and in combination with a. wheel rimand a pneumatic tire mounted thereon, supporting members secured to therim and disposed on opposite sides of the tire, and a tread structureresting on and movable inwardly and outwardly with the tread of the tireand supported by said supporting members, said supporting members andtread structure having relatively movable engaging surfaces at oppositesides of'the tread structure operative to limit the outward movement ofthe tread structure under a predetermined air pressure in the tire andoperative to limit the inward movement of the tread structure, theengaging surfaces of the supporting members including portionsoverlapping the lateral edges of the tread structure and forming fixedsurfaces for contact with the road surface and on which the wheel mayrun in the event of deflation of the tire.

19. In a pneumatically-tired wheel for vehicles, and in combination witha channeled vehicle wheel rim having tire retaining flanges, a pneumatictire having edge portions engaging said flanges, and guard platesdisposed at opposite sides of and having curved surfaces bearing on theside walls of the tire, said plates being-provided with inner portionsdisposed in spaced relation to the retaining flanges and with straightouter portions disposed on opposite sides of the tread portion of thetire and projecting radially therebeyond, lugs fixed to the outersurfaces of the retaining flanges and forming abutments for the saidinner portions of, the guard plates, means detachably connecting theinner portions of the guard plates to the lugs, a supplemental treadbearing on the tread portion of the tire, and a supplemental rimcarrying the supplemental tread and detachably mounting the same on thestraight outer portions of the guard plates, said supplemental rimhaving sliding engagement with said plate portions for inward andoutward movements with the tread portion of the tire.

20. In a pneumatically-tired wheel for vehicles, and in combination witha channeled vehicle wheel rim having tire retaining flanges, andapunematic tire having edge portions engaging said flanges, guardplatesdisposed at opposite sides of and having curved body portionsbearing on the side walls of the tire, said plates being provided withinner sup-porting portions disposed opposite and in spaced relation tothe flanges and outer supporting portions disposed at opposite sides ofthe tread of the tire, and inclosing the tire between said flanges andtire tread, bracket members fixed to the flanges and j forming abutmentsfor the inner supporting portions of the guard plates, fastening meansconnecting the inner supporting portions of the guard plates with saidbracket members, and a supplemental tread resting on the tread of thetire and connected to the outer supporting portions of the guard plates.

21. In a pneumatically-tired wheel, and in combination with a wheel rimhaving bead receiving flanges, and a pneumatic tire having,

beads engaging said flanges, a frame or casing comprising guard platesarranged onopposite sides of the tire and inclosing the tire, with theexception of its tread surface, said plates having inner peripheralportions disposed opposite the flanges'of the rim and outer peripheralportions disposed opposite the lateral margins of the tread surface ofthe tire, means disposed between and fastening the inner peripheralportions of the plates to the flanges of the rim, a

supplemental tread resting on the tread surface of the tire and having atread surface and portions lying laterally beyond and radially inward ofits tread surface, and connecting means between the supplemental tread'and plates com- 'prising parts embracing said portions of thesupplemental tread lying laterally beyond and radially inward of itstread surface and movably holding the supplemental tread in engagementwith the outer peripheral portions of the plates.

JULIUS KINDERVATER.

